Infineon Technologies TLD23313EPXUMA1

Overview

TLD23313EPXUMA1 from Infineon is a triple-channel automotive-grade high-side LED driver IC with integrated protected current sources, designed to drive up to 80 mA per channel across red/amber LEDs in stop/tail and turn indicator functions. It features ±5% current accuracy at 300 mA setpoint, 0.1 µA sleep-mode current, and reverse-polarity protection for low-battery operation down to 5.5 V supply.

For engineers reviewing the TLD23313EPXUMA1 datasheet, TLD23313EPXUMA1 pinout, TLD23313EPXUMA1 application, or TLD23313EPXUMA1 equivalent, this device supports precise digital dimming, intelligent shared error-network fault management (up to 16 devices), and single-LED short detection-critical for AEC-Q100-compliant exterior lighting systems requiring thermal robustness and load diagnosis.

Technical Context

The TLD23313EPXUMA1 implements three independent high-side current-regulated output stages controlled via dedicated IN_SETx pins, each adjustable by external resistors or reference sources. Its internal supply regulation enables stable operation across 5.5–40 V input, while thermal and reverse-battery protections operate autonomously without host intervention.

Fault diagnostics include open-load, short-to-GND, and single-LED short detection using SLS_REF and DS pins, with configurable retry strategies via capacitor timing on D and DS. The ERRN pin provides open-drain error signaling compatible with daisy-chained multi-device networks using a single external pull-up resistor.

Key Specifications

Pinout & Package

Delivered in PG-TSDSO-14 package with exposed thermal pad (EP) connected to GND, enabling efficient heat dissipation in compact automotive lighting modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-channel high-side LED driver applications.

Compared with ASL3416SHUML and TLD20313EPXUMA1, the TLD23313EPXUMA1 uniquely balances triple-channel capability, AEC-Q100 qualification, SLS diagnostics, and minimal external components-making it optimal for cost-constrained yet safety-critical exterior lighting nodes without MCU overhead.

Availability

TLD23313EPXUMA1 is available at Aetrix Electronics and suitable for automotive exterior lighting, interior ambient lighting, and industrial status indication requiring stable component supply, AEC-Q100 compliance, and thermal resilience up to +150°C junction temperature.

Supply support for TLD23313EPXUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global manufacturing and automotive qualification infrastructure.

The LITIX™ Basic+ product line delivers robust, cost-optimized LED drivers for automotive lighting functions-including stop, tail, turn, DRL, and interior illumination-designed to reduce system complexity while meeting stringent AEC-Q100 reliability standards.

FAQ

What is the maximum allowable thermal resistance (R_thJA) to sustain 80 mA per channel continuously?

The datasheet does not specify a maximum R_thJA value but states that 80 mA operation depends on actual board-level thermal resistance. At 60 mA nominal (8–18 V), continuous operation is guaranteed within −40°C to +150°C junction range. For 80 mA, designers must ensure PCB copper area and EP soldering meet Infineon's layout guidelines in Section 8 to avoid exceeding TJ(max) = 150°C under worst-case ambient and power dissipation.

Can the ERRN pin be directly connected to a microcontroller GPIO without a pull-up resistor?

No. ERRN is an open-drain output and requires an external pull-up resistor (typically 4.7 kΩ to VS) to generate a valid logic-high level. Connecting ERRN directly to a GPIO without pull-up results in undefined or floating state during normal operation. The resistor value must also support bus capacitance when daisy-chaining multiple devices per the error network topology described in Section 6.1.

Is reverse polarity protection active during sleep mode?

Yes. Reverse polarity protection remains fully functional in sleep mode, allowing the device to survive battery misconnection events even when EN/DEN is deasserted and outputs are disabled. This is confirmed by the absolute maximum rating table (Table 2), which specifies −18 V minimum VS and −18 V minimum VEN/DEN–VS, and by the functional range definition covering operation down to 5.5 V supply with reverse protection enabled.

How does the SLS (Single LED Short) detection differ from standard short-to-GND detection?

SLS detects a short between two adjacent LEDs in a series string (e.g., anode of LED2 shorted to cathode of LED1), whereas standard short-to-GND detects OUTx directly shorted to GND. SLS uses the SLS_REF pin to set a reference voltage and the DS pin to configure timing, enabling discrimination between true load shorts and partial-string faults-critical for diagnosing degraded LED arrays without false positives in multi-LED chains.